(**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *)

type t

val compare: t -> t -> int

val trace_depth: t -> int
val unit_trace: Type.t -> Type.use_t -> t
val rec_trace: max: int -> Type.t -> Type.use_t -> t -> t
val concat_trace: t list -> t
val dummy_trace: t

val reasons_of_trace:
  ?level:int ->
  t ->
  Reason.reason list
